Not able to add a java util collection to JsonObject

Question

not able to put a any Java Util object to json object java.lang.NoSuchMethodError: org.json.JSONObject.put(Ljava/lang/String;Ljava/util/Map;)Lorg/json/JSONObject; while for below. was using org.json version 20170516

 final List<String> usersList = getUserList()
final JSONObject inputData = new JSONObject();
   inputData.put("users", usersList );

Similar error was coming while try to put map as well

Why is it complaining about a Map when you pass a List? – Boris Oct 25 '18 at 09:06 — Boris, Oct 25 '18 at 09:06

score 0 · Answer 1 · answered Oct 25 '18 at 09:11

This example show you how to convert Java collections object into JSON.

Try the following:

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;

final List<String> usersList = getUserList()
Gson gson = new Gson();
String users = gson.toJson(usersList);

Not able to add a java util collection to JsonObject

1 Answers1